SipDemo is Not working in android 2.3.6

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http://stackoverflow.com – I created sip calling using SIPDEMO. I am able to call using sip2sip and working well. but when i run in android 4.0 then it is OK . but when i run in android 2.3.6 device . it is not working . i checked by SipManager.isApisupport() and giving me FALSE. Do here any ways so sipdemo will be support on 2.3.6 version. I tried in 2.3.4 also but not working. please android expert help me . i have involved with this problem. thank you very much . (HowTos)