asterisk users - Apr 2011 - Features.conf - Blind Transfer

Hi guys, 

I'm trying to get blind transfer to work and automatically transfer call
to another number on key sequence press. 

Extensions.conf_snippet

[from-pstn]
exten => _0399377744,1,Set(__DYNAMIC_FEATURES=blindxfer)
exten => _0399377744,n,Set(__GOTO_ON_BLINDXFR=to-pstn ^0388924326^1)
exten => _0399377744,n,dial(SIP/0399377704 at c5400-02,T)



[to-pstn]
Exten => _XXX.,1,dial(sip/0388924326@ c5400-01)


Features.conf_snippet

[featuremap]
blindxfer => #1         


on #1 all I get is silence, and debug shows call going to 'i'

ast ver 1.4.24

Appreciate your help

Thanks,