Ok, I had a same problem before and even though I could swear there was a t-server option I cannot find it.
The other way (and not as glamorous is to set it in yout TExtension.TAgentWorkMode. 
According to Genesys, by default it is 0, which [color=red]SUPPOSEDLY[/color] sets your agent into NOT-READY mode, but it does not seem to be like that (at least with SIP T-Server). So, you would need to specify it directly. AuxMode perhaps?
Here is the reason why I am saying "SUPPOSEDLY". If you look at the enclosed log, you will see that there is EventAgentReady after login despite AgentWorkMode = Unknown.
[color=green][size=8pt]15:47:01.109 Trc 04541 RequestAgentLogin received from 460 (001c CTISIP_Client)
message RequestAgentLogin
	AttributeThisQueue	'Q1'
	AttributeThisDN	'6002'
	AttributeAgentID	'10010'
	AttributeAgentWorkMode	0 (Unknown)
	AttributeReferenceID	3
15:47:01.109 -- created: CRequest@01BEF8F0 RequestAgentLogin-CTISIP_Client[460]/3
15:47:01.109 +++ CIFace::Request +++
   -- new invoke
  Parsed: RequestAgentLogin
  From: CTISIP_Client[460]/3
  Numbers: +<6002> -<none>
  Status: parsed:1 queued:0 sent:0 acked:0 preevent:0 event:0 context:0 transferred:0
  -----
   -- AgnEmu: global ACW 0
@15:47:01.1090 [0] 7.2.100.42 distribute_response: message EventAgentLogin
	AttributeEventSequenceNumber	00000000000001ec
	AttributeTimeinuSecs	109000
	AttributeTimeinSecs	1170226021 (15:47:01)
	AttributeReferenceID	3
	AttributeThisQueue	'Q1'
	AttributeAgentID	'10010'
	AttributeThisDN	'6002'
@15:47:01.1090 [ISCC] Debug: Translate: '' -> ''; result 1 ()
15:47:01.109 Trc 04542 EventAgentLogin sent to 460 (001c CTISIP_Client)
15:47:01.109 Trc 04542 EventAgentLogin sent to 440 (0006 CTISIP_Client)
15:47:01.109 Trc 04542 EventAgentLogin sent to 388 (0002 StatServer)
[color=red]@15:47:01.1090 [0] 7.2.100.42 distribute_event: message EventAgentReady
	AttributeEventSequenceNumber	00000000000001ed
	AttributeTimeinuSecs	109000
	AttributeTimeinSecs	1170226021 (15:47:01)
	AttributeThisQueue	'Q1'
	AttributeAgentID	'10010'
	AttributeThisDN	'6002'
[/color]@15:47:01.1090 [ISCC] Debug: Translate: '' -> ''; result 1 ()
15:47:01.109 Trc 04542 EventAgentReady sent to 460 (001c CTISIP_Client)
15:47:01.109 Trc 04542 EventAgentReady sent to 440 (0006 CTISIP_Client)
15:47:01.109 Trc 04542 EventAgentReady sent to 388 (0002 StatServer)
[/size][/color]
Tell me how it went!
Best regards,
Vic