i have install MSSQL SERVER 2008 enterprise edition and SSIS package,

but in SSIS given the error of create new project the error show

"Micosoft visual studio is unable to load this document:

Unable to cast COM object of type 'Microsoft.SqlServer.Dts.Runtime.Wrapper.PackageNeutralClass' to interface type 'Microsoft.SqlServer.Dts.Runtime.Wrapper.IDTSPackageSigning100'. The operation failed because the QueryInterface call on the COM component for the interface with IID'{A896D87C-D1B2-4FAE-9339-CFAFEFE617BE}'failed due to the following error. No such interface supported (Exxeption from HRESULT:0x80004002 (E_NOINTERFACE))."

plz giving me solution of that above error.