Delta,
 
Had the same problem.  I'm using a brother P-touch PT-2300.
 
First, the correct software and drivers have to be installed according to the brother documentation!  this is critical to get everything else to work.
 
Next,  restore your 1up label form.  It doesn't matter if it's greater than the default page size. set the width to what you want it to be.  (Be careful with that fields or thay may cut off on the print!) When the form has the information and layout you want save it.
 
In DBA go into UT-G, choose your form and set the size there along with any margins you may need. (I'm printing inv labels on 1" stock so I have mine set to 1.0000, 0, 0, 1)  Then set the default printer to the brother printer.
 
Print your label and you should be working!
 
If you are printing barcodes, make sure you print with as much information as possible and test it!  the forms have a tendancy to clip data!  for an example, I print inventory labels I have a dummy item for testing that has a part number that is 15 char long with all description fields maxed out. that way I can be sure everything is getting printed, especially the barcode.  Before I made the test item, I printed and labeled a bunch of material to find out later that my scanner couldn't read them because the stop bit on the barcode was clipped.
 
Hope it helps,
 
Tim