SSIS extract data from informix to sqlserver 2008 works in XP development machine but won't work in windows 7 machine

SSIS package to extract data from informix to sql server 2008R2 was developed in windows XP machine which works great.  But the same pakcage has issue in my development enviroment in Windows 7.  The varchar data type columns won't be able to be inserted into SQL server database.  My package uses ADO.Net Source, ODBC connecting to informix which works fine to get data from informix database,  the destinations uses OLE DB Destination to connect to sql server 2008R2. 

I also tried to extract from informix into flat file in wondows 7 enviroment.  It has the same issue:  varchar data fields cannot insert into.

any idea?  very appreciated!

thanks!

mei