Response.redirect (The resource cannot be found)

Hi

VS 2005 and .Net framework 2

I am redirecting to a folder within the app but get message that resource can't be found
while working on a single enterprise whereas others go through to the next screen.

My redirect is :
            Response.Redirect("~/Forms/frmPart2.aspx?Unit_Nbr=" & Trim$(Master.txtNumberENlbl.Text) & "&USICode=" & Trim$(Master.txtUSICodee.Text) & "&SurveyDate=" & Trim$(Master.lblSurvey_CodeR.Text) & "&LegalName=" & Trim$(Master.txtLegalTradeNamee.Text) & "&Phone=" & Trim$(Master.txtContactNumberr.Text) & "&Ou_Nbr=" & Trim$(Master.txtNumberOUlbl.Text) & "&MaintUser=" & Trim$(MaintUser) & "&MaintDate=" & Trim$(Now.Date) & "&Status_Colour=" & Trim$(Master.txtStatuSS.Text) & "&SystemMode=" & Trim$(Master.lblModes.Text))

Error given is:

The resource cannot be found.
Description: HTTP 404. The resource you are looking for (or one of its dependencies)
could have been removed, had its name changed, or is temporarily unavailable.  P
lease review the following URL and make sure that it is spelled correctly.

Requested URL:  /Agriculture 2010/Forms/~/Forms/frmPart2.aspx

What could be the cause of : '/~/' since I am requesting  /Agriculture 2010/Forms/frmPart2.aspx

It seems to be looking in two forms folders and there is this /~/ in between.
The forms are in the Agriculture 2010 folder, being the project folder.

Please assist with a solution.

Thanks, Mandyprogza