Grdiview event not fired inside the modelpopup extender

Hi friends 
Please help me,
I have two grid 
for e.g
Grid A
ID Name link 
1  A         Show
2  B         Show
ID , Name  Template Field 
Show LinkButton
Click on Show button model popup would open,
that popup also contain one gridview
like 
Grid B
ID Value cal
1   10     Minus
2   20    Minus
id , value are Template Field 
minus is linkbutton
i write down the code on GridB Row Command 
without using model popup i get all the event
but inside the modelpoup i  can't get the row command or any other event 
Please Help me.




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