I just download oQueue and this is my lua error

Message: Interface\AddOns\oqueue\oqueue.lua:24672: attempt to concatenate upvalue 'player_realm' (a nil value)
Time: 03/23/14 03:02:55
Count: 1
Stack: Interface\AddOns\oqueue\oqueue.lua:24672: in function `on_init'
Interface\AddOns\oqueue\oqueue.lua:22841: in function `?'
Interface\AddOns\oqueue\oqueue.lua:22877: in function <Interface\AddOns\oqueue\oqueue.lua:22874>

Locals: now = 207994.111
(*temporary) = <function> defined =[C]:-1
(*temporary) = <function> defined =[C]:-1
(*temporary) = "Dazdengo"
(*temporary) = "-"
(*temporary) = nil
(*temporary) = "kazzak"
(*temporary) = "^%l"
(*temporary) = <function> defined =[C]:-1
(*temporary) = "Kazzak"
(*temporary) = 0
(*temporary) = "6ePgY"
(*temporary) = ""
(*temporary) = "e"
(*temporary) = ""
(*temporary) = "attempt to concatenate upvalue 'player_realm' (a nil value)"
oq = <table> {
 hint_next = <function> defined @Interface\AddOns\oqueue\oqueue.lua:15091
 update_scores = <function> defined @Interface\AddOns\oqueue\oqueue.lua:19774
 add_voip_subselection = <function> defined @Interface\AddOns\oqueue\oqueue.lua:13356
 route_to_boss = <function> defined @Interface\AddOns\oqueue\oqueue.lua:22158
 on_top_dps_recvd = <function> defined @Interface\AddOns\oqueue\oqueue.lua:18075
 queue_popped = <function> defined @Interface\AddOns\oqueue\oqueue.lua:22662
 onShow_tab1 = <function> defined @Interface\AddOns\oqueue\oqueue.lua:13049
 timer_invite_group = <function> defined @Interface\AddOns\oqueue\oqueue.lua:8414
 remove_btag_from_meshcache = <function> defined @Interface\AddOns\oqueue\oqueue.lua:10788
 calc_pkt_stats = <function> defined @Interface\AddOns\oqueue\oqueue.lua:3916
 set_deserter = <function> defined @Interface\AddOns\oqueue\oqueue.lua:19444
 send_q = <table> {
 }
 pending = <table> {
 }
 decode_hp = <function> defined @Interface\AddOns\oqueue\oqueue.lua:20240
 player_new_level = <function> defined @Interface\AddOns\oqueue\oqueue.lua:23799
 get_mmr = <function> defined @Interface\AddOns\oqueue\oqueue.lua:3123
 get_bg_experience = <function> defined @Interface\AddOns\oqueue\oqueue_premade_info.lua:413
 set_group_lead = <function> defined @Interface\AddOns\oqueue\oqueue.lua:10600
 clear_report_attempts = <function> defined @Interface\AddOns\oqueue\oqueue.lua:24803
 waitlist = <table> {
 }
 group_left = <function> defined @Interface\AddOns\oqueue\oqueue.lua:8790
 get_spell_crit = <function> defined @Interface\AddOns\oqueue\oqueue.lua:3144
 create_tab_banlist = <function> defined @Interface\AddOns\oqueue\oqueue.lua:14372
 raid = <table> {
 }
 pass_preference_filter = <function> defined @Interface\AddOns\oqueue\oqueue.lua:12106
 space_it = <function> defined @Interface\AddOns\oqueue\oqueue.lua:5680
 raid_announce_relay = <function> defined @Interface\AddOns\oqueue\oqueue.lua:6754
 pm_tooltip_set = <function> defined @Interface\AddOns\oqueue\oqueue_tooltips.lua:741
 first_open_seat = <function> defined @Interface\AddOns\oqueue\oqueue.lua:22910
 trim_oldies = <function> defined @Interface\AddOns\oqueue\oqueue.lua:17619
 send_to_scorekeeper = <function> defined @Interface\AddOns\oqueue\oqueue.lua:4655
 create_scenario_group = <function> defined @Interface\AddOns\oqueue\oqueue.lua:9500
 start_ready_check = <function> defined @Interface\AddOns\oqueue\oqueue.lua:18643
 cell_occupied = <function> defined @Interface\AddOns\oqueue\oqueue.lua:9084
 on_grp_stats = <function> defined @Interface\AddOns\oqueue\oqueue.lua:21267
 player_died = <function> defined @Interface\AddOns\oqueue\oqueue.lua:23781
 update_raid_listitem = <function> defined @Interface\AddOns\oqueue\oqueue.lua:17527
 get_premade_type_desc = <function> defined @Interface\AddOns\oqueue\oqueue.lua:13535
 toggle_threat_level = <function> defined @Interface\AddOns\oqueue\oqueue.lua:919
 send_leave_waitlist = <function> defined @Interface\AddOns\oqueue\oqueue.lua:7593
 on_mesh_tag = <function> defined @Interface\AddOns\oqueue\oqueue.lua:10836
 on_group_roster_update = <function> defined @Interface\AddOns\oqueue\oqueue.lua:23616
 togg

what does this return:
/script print( GetCVar("realmlist") ) ;

also, what region are you?  US or EU?  

this problem is usually when the realmlist is pointing to the wrong region

I am playing in EU region

us.logon.worldofwarcraft

Well how can I resolve this issue please I check the realm list I got its says its eu but when I enter /script print( GetCVar("realmlist") ) in wow its return this us.logon.worldofwarcraft

can you please tell me how to change this?

you need to correct the logon server info, which may be found in realmlist.wtf.  or maybe check the wow forums for a solution