i installed one of my application in 32 bit machine it's working well.but same application is run with 64 bit machine,we unable test successfully.we get following errors:

Error : An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)

this error only came when my code is calling com dll's that time it's gives this error.otherwise application was running good.

please let me know how can i solve this issue.please share your idea here.