Issue with Parameter Value on Append and Update Query commands

Hey Experts!

I have three tables: tblMain, tblECOInfo, tblECRInfo

tblMain consists of: ECO# and ECR#
tblECOInfo consists of: ECO# and other fields
tblECRInfo consists of: ECR#, ECO# and other fields

The two ...Info tables are linked to tblMain respectively.

The problem:
When, in a form, the user clicks a button that calls an append query to send the ECO# currently displayed on the form (recordset from tblECRInfo) to tblECOInfo it prompts for a Parameter Value...

The same thing happens for my update query, which fires after the append query...

What is the issue with my coding???  Exact examples listed below...

INSERT INTO tblECOInfo ( [ECO#] )
SELECT tblMain.[ECO#]
FROM tblMain LEFT JOIN tblECRInfo ON tblMain.[ECR#] = tblECRInfo.[ECR#]
WHERE (((tblMain.[ECO#])=[frmECR].[ECO#]));

UPDATE (tblMain LEFT JOIN tblECOInfo ON tblMain.[ECO#] = tblECOInfo.[ECO#]) LEFT JOIN tblECRInfo ON tblMain.[ECR#] = tblECRInfo.[ECR#] SET tblECOInfo.[DrawingsToCreate/Edit] = tblECRInfo![DrawingsToCreate/Edit], tblECOInfo.[ItemsToCreate/Edit] = tblECRInfo.[ItemsToCreate/Edit], tblECOInfo.[BOMsToCreate/Edit] = tblECRInfo![BOMsToCreate/Edit]
WHERE (((tblECOInfo.[ECO#])=));

Please HELP!!  ::pulling hair out::Start Free Trial