Access 2003

I have very simple form with one ComboBox to select software titles.  I just
want to see every computer with a specific piece of software installed.  If
someone could explain why queries run from the form return nothing, I'd sure
appreciate it.

Query is "Software Search"
Form is "Software Search"
Combox box is "SoftwareList"

Criteria of the query is "Like [forms]![software search]![softwarelist]"

I can select from the list and run the query from a command button and get
nothing, but I can run the query outside the form and type in a name, and it
works fine.

The following is the code for the On Click event of the button:
Private Sub Command2_Click()
On Error GoTo Err_Command2_Click

   Dim stDocName As String

   stDocName = "Software search"
   DoCmd.OpenQuery stDocName, acNormal, acReadOnly

Exit_Command2_Click:
   Exit Sub

Err_Command2_Click:
   MsgBox Err.Description
   Resume Exit_Command2_Click
   
End Sub