Modules & VBA :: Error 3070 When Opening Report?

When i run the following code to open my report a receive the following error..

error 3070 the microsoft access database engine does not recognise " as a valid field name or expression

Code:
strDocName = "rptBarcodingMonthly"
MsgBox strDocName
DoCmd.OpenReport strDocName, acViewPreview

The code behind the report - sets on open_report event is the following however i cant see any issues with it as i use it elsewhere..

Code:
' Create underlying recordset for report using criteria entered in
Dim intX As Integer
Dim qdf As QueryDef
Dim frm As Form
' Set database variable to current database.
Set dbsReport = CurrentDb

[code]....

I will also attach a copy of how i set the criteria in the query and the parameters