failed to open rowset

i've been received this error while i want to preview my report.

Failed to open rowset.
[Microsoft][ODBC SQLServer Driver] Communication link failure.

why is this happen? and what should i do? when i check with query analyzer, all the data do appear.

thanks.

regards.Open the Report and Do Verify database|||Open the Report and Do Verify database

thank u so much madhi :)|||Did you solve the problem?|||Did you solve the problem?

i did.. and after make some correction on sql command, my program now successfully running :D

thank u..

have a nice day;)