We come across this same problem in VB COM components. Remember that all variables in VBScript are Variants so their types can get whacked when passing them as parameters. Try wrapping your variables in the appropriate typecasting function. In your case try CLng(FirstNumber) and CLng(SecondNumber).

>Hi:
>
>I'm using W2000 Professional and IIS 5.0. Currently I'm unable to pass ASP "form elements" to my VFP COM DLL. For example:
>
>{VB Script Code}
>SET oCalculate = server.CREATEOBJECT("SquareNumbers.Generate")
>FirstNumber = REQUEST.FORM("FirstNumber")
>SecondNumber = REQUEST.FORM("SecondNumber")
>MyResult = oCalculate.HowManySquareUnits(FirstNumber,SecondNumber)
>
>This is a simple DLL that just calculates the square of two numbers--I'm learning to crawl here with ASP and VFP COM :-)
>
>In my VFP Error event I get a "data type mismatch" when I multiply the two parameters together:
>
>FUNCTION HowManySquareUnits
> LPARAMETERS FirstNo,SecondNo
>
> LOCAL lnResult
>
> lnResult = FirstNo*secondNo && It errors here!--the data types are Logical
>
> RETURN lnResult
>ENDFUNC
>
>The real funny thing is that if I pass literals it works!
>MyResult = oCalculate.HowManySquareUnits(123,456) This works!
>
>What am I doing wrong here?
>
>Thanks for all your input, and for all the other responses regarding my previous question with the "File Access Denied"--all of your responses were very helpful!
>
>--Paul