Getting error after removing parameter in SSRS on SSAS cube

Hi,
I removed query parameter in SSRS data source is SSAS cube.
I am getting below error whle running the report
"an error occurred during local report processing the definition of the report '.......' 
is invalid  the report parameter '.....' valid values referes to a dataset '.....',
which does not exist "
In report, I removed every thing which is related to the removed parameter.
Please help on this what could be the reason.
Thanks in advance
Ramesh