AutoCAD Visual LISP / AutoLISP :: DCL Radio Button Label Length

I am trying to revise an old dialog box so that I can add some new options but I'm finding it difficult to shorten the label for a radio button enough to get the box width to look reasonable. I read somewhere that Windows fonts cause the label lengths to hold extra space for each character. The webpage that I found this on said the solution was to make a new line for the label, which sounded great to me, but they did not tell how to do it. After much searching, I figured out how to add an additional line to the label, but my program now refuses to function correctly. I set the middle button before initiating the dialog in my lisp, but when I select a different option, the original button remains selected along with the user's choice. The program actually works, using the last button selected, but I really want the button to respect the pick by the user and deselect the default button.

This worked perfectly when I had only two selections, and it still worked perfectly when I added the third option, but it just doesn't like it when I try to add a new line for the long description in the middle of a radio column.

I'm barely functional with dialog boxes..

DCL in question:
:boxed_radio_column { label = "Location"; width = 20; height = 2; fixed_width = true; fixed_height = true; alignment = top; :radio_button{key = "sl-AD"; label = "Spring Lake Applications";} :text_part{label = " and Distributor Services";} :radio_button{key = "sl-BP"; label = "Spring Lake BP Systems";} :radio_button{key = "gr"; label = "Grand Rapids";} }
 
lisp has the following in this order:

load dialog - I have a loading function that works fine
(set_tile"sl-BP""1")
(action_tile"sl-AD"           "(TGW-Setup_01 $key)")
(action_tile"sl-BP"           "(TGW-Setup_01 $key)")
[Code] .....

Of course, these are just the pertinent sections of a much larger setup dialog, but I didn't think I needed to post all the functions that this program is doing, since you'd have a difficult time running this without my templates, printers and a number of support files.

Like I said, it seems to be choking on my adding :text_part {  Label = "      and Distributor Services";} instead of making this a single line of the label for the button above it.

Why does this cause the default radio button to stop releasing?