Setting Check Box on IRS For 1041

Hi everyone.

Not seeing anything particulally specific by way of a solution on this problem.

I am using an MS Access DB application that will populate information into a IRS Form 1041.

The interactive text field controls are fine, but the Check Boxes seem to be problematic.  The check populates when the form is generated, but when it is saved the checkbox returns to unchecked.

JSO.getField("topmostSubform[0].Page1[0].DateNameAddress_ReadOrder[0].f1_1[0]").Value = xBegDate
JSO.getField("topmostSubform[0].Page1[0].DateNameAddress_ReadOrder[0].f1_2[0]").Value = xEndDate
JSO.getField("topmostSubform[0].Page1[0].DateNameAddress_ReadOrder[0].f1_3[0]").Value = xYtEnd
JSO.getField("topmostSubform[0].Page1[0].DateNameAddress_ReadOrder[0].f1_4[0]").Value = xPlanName
JSO.getField("topmostSubform[0].Page1[0].DateNameAddress_ReadOrder[0].f1_5[0]").Value = xTrustCompany
JSO.getField("topmostSubform[0].Page1[0].DateNameAddress_ReadOrder[0].f1_6[0]").Value = xTrustCompanyaddress1
JSO.getField("topmostSubform[0].Page1[0].DateNameAddress_ReadOrder[0].f1_7[0]").Value = xTrustCompanyaddress2
JSO.getField("topmostSubform[0].Page1[0].LinesC-E[0].f1_10[0]").Value = xOTC_EFF_DATE
JSO.getField("topmostSubform[0].Page1[0].LinesC-E[0].f1_9[0]").Value = xEIN
JSO.getField("topmostSubform[0].Page1[0].SignatureDate_ReadOrder[0].SignatureDate_ReadOrder[0].f1_47[0]").Value = xFiduciaryEIN
JSO.getField("topmostSubform[0].Page1[0].LinesA-B[0].c1_6[0]").Value = 1  'This is the portion of the code 'that sets the "Grantor" Checkbox.

aPDDoc.Save PDSaveIncremental, FileName 'Save changes to the PDF document

This should be a relatively straight forward solution...... given the fact that automating the filling of pdf tax forms is a routine task I would think.

Thanks in advanced.

Richard