Access 97 problem with form and records

Hello, I am currently working on a project but I recently encountered a problem which I cant find the solution, so here it is:
I have my form which contains all the records and I want to make a little checkup before it shows the record details… But when I put my code which is similar to this exemple:
If me.txtTest.value <> “” then
me.cboTest.Enabled = false
End if

It simply dont work… I’m adding this code to the form_open thing but it keeps the result, so if my 1st record was true well ALL other records will be which is something I dont want at all.

Thanks in advance.