Unable to import IDoc from ECC to PI 7.1(ESR)

Hi,

I am creating an IDoc to File scenario in PI7.1 . I am trying to import the MATMAS IDoc from ECC to PI 7.1.So under the SWCV -> Imported Objects - > Wizard to import IDod/RFC opens -> I enter the ECC system login details -> But when I expand the IDoc node here,I find no IDoc from ECC ,moreover it throws me an error " component should be attached to some frame or dialog"

Can you please suggest me as what is going wrong.

Thanks,

Venu