No value given for one or more required parameters

Error Type:
Microsoft JET Database Engine (0x80040E10)
No value given for one or more required parameters.
/Project_palliativDotOrg/www/admin_url_refer.asp, line 32

strSQL = "SELECT Refer,COUNT(Refer) AS antall FROM tblWPStatistikk GROUP BY Refer ORDER BY ANTALL DESC"
--> Linje 32 adoRs.Open strSQL, adoCn, 3, 1, &H0001

Hva er feil dette virker helt bra på MS SQl men ikke Access!