Action Required on the upgradation of EA

Hi All,
We are facing some problems over the upgradation of Jacada
EA fromk 3.1 to 3.5. Does anybody have the knowledge on the
upgradation? We are getting some exceptions and also we had
got an error like:
C:MapMakersrcaddSSIRSaddSSIRS_custom.java:53:
incompatible types
found   : com.cnt.mapstudio.gbbasic.GBMethod
required: com.cnt.mapstudio.gbbasic.stream.GBStreamMethod
        GBStreamMethod onFailMethod =
getMap().getMethod("finalization");
 
If anybody knows on that, pls help us on the upgradation..

 Thanking You,

                     - Rajan