Problems With VB2010

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VB

VB10

Hi
Guys i have some problems with vb10 that i didnot have a long time

1. when i try to debug, i get an error :
No Source Code Available

and the it says something about activationContext ...
i did not have this problem ... i dont see why i should get this error
when i delete everything in my Bin\Debug folder, vb compiles just one time and everytime i have to delete debung folder in order to compile my program
what should i do ? (I already tried reinstalling VB10 and .net 4 and no results)

2. a part of my code used to work without problem but now it generates stupid error :
here is my code :

Dim group as integer
group = GRPinp.text

if pc = 1 then
ReportViewer1.LocalReport.ReportEmbeddedResource = "MyP_2.Bottle.rdlc"
Me.MyDTableAdapter.FillByGroup(Me.MyDDataset1.MyD,group)
end if

FillByGroup sql syntax :

SELECT   Serial
FROM MyD
WHERE [Group] = ?

*[Group] is a column

the error it generates :

No Value given for one or more required parameters.

Error Code : -2147217904

i ran the same code 2-3 days ago and did not have any problems. i did not even change settings or program properties ! what should i do?

tnx