CPS parameters are not getting updated in SAP

We have recently migrated our SAP and CPs servers, after that we are facing few CPS issues and it is affecting lot of key batch jobs. One typical example is given below.

CPS is supposed to trigger a job DD simulation, by copying the SOURCE_DATE_ID -1-Dec-2006 and modifies the parameters BUDAT and FAEDA_HIGH. The parameter FAEDA_HIGH is calculated as time.now()+ 5 working days as defined in the expression. When we try to run the job today with the date 24 Dec 2010, CPS has calculated the FAEDS_HIGH correctly as 2-Jan-2011. IN SAP the variant gets created but for the field FAEDA_HIGH the date value is not getting updated properly it is display some other date. (e.g) It is showing as 4-jan-2011, I removed the xpression and gave another date for the FAEDA_HIGH field as 10/01/2011, but in SAP it is not getting updated.

Has anyone faced similar kind of issue. share you experience

Regards,

Ramprasad.