Your FindFirst syntax is wrong. FindFirst accepts a ColumnName, and then the value you wish to find in that Column. The fact that ones with an apostrophe work is a mystery to me - you should error out every time the compiler reaches that line.
However, your query does include a column named "CoNmeCoID", which you may be able to use:
rs.FindFirst "CoNmeCoID='" & Me.cboEmployerContact & "'"
I'm acutally surprised the other syntax would work at all ... it should have never found anything ...