Tab Within MS Flexgrid in Access 97

I have placed a flexgrid on an access form with a text box that should move from cell to cell, the text box will allow my users to 'change' the data in the grid. I referenced MS KB article #241355 for instructions on doing this. Everything appears to work fine except for one thing. I cannot tab out of the text box once it is activated, I must click another cell with the grid to move the focus.  

I have registered the FM20.DLL and have referenced the Microsoft Forms 2.0 Object Library. One thing that I notice is this, in design view if I right click my text box (my text box is the activeX textbox) and choose TEXTBOX OBJECT - EDIT I get a screen that says "The operation on the textbox object failed. The OLE server may not be registered. To register the OLE server reinstall it."

Is anyone familiar with the use of flexgrids and textboxes in access?

Thanks,
Jessi