Error upon rsObject.Open

Hello,

Using the following SELECT statement:

strSQL = "SELECT tblCustomerTests.TestValMin, tblCustomerTests.TestValMax, tblItems.ItemID, tblItems.ItemNum, tblItems.ItemDesc, tblItems.ItemSpecInst, tblItems.EntryDate, tblTests.TestID, tblTests.TestType, tblTests.TestDesc, tblTests.TestStd, tblTests.TestUOM, tblTests.TestComp FROM (tblCustomerTests LEFT JOIN tblItems ON tblCustomerTests.ItemID = tblItems.ItemID) LEFT JOIN tblTests ON tblCustomerTests.TestID = tblTests.TestID WHERE tblCustomerTests.CustID = " & intCustID & " ORDER BY tblCustomerTestsCustName"

I receive the following error:

Microsoft JET Database Engine error '80040e10' No value given for one or more required parameters.

I've used Response.Write to verify intCustID has a value. Any direction would be appreciated.

Thanks!