Getting Error while accessing BEx 7.0 from Portal 7.0

Hello portal Experts,

I've created BEx 7.0 iview,page,workset,role and assigned role to one user which is existed in portal 7.0 as well BW7.0.

when i login through that user in portal ,role is appearing when i clicked on that role it should get BEx report form BW system but not getting.

Could any one assist me how to overcome this problem

Thanks in Advance

RamanaRao