SSIS Maximum string variable length is 4000 ??? how to eliminate this variable limit ???

Hi all ,

I have  string type variable  , storing xml data

I have Execute Sql task , in that  a Proc  executes and save xml data in String type varibale  and this variable

is supplied to next Task2 and that varible size limit >4000 ,, how to eliminate this size limit ?? the pkg should use that varible

Please help