[PyMOL] Can't figure out APBS

[mynameis n. <pin...@ho...>]

For some reason I just can't get APBS to render an electrostatic surface for 
me.
I have installed pymol 0.99 beta37 and APBS 4.0 on Windows XP

Here are the steps I currently take:
1) I load my PDB molecule into Pymol
2) go to Plug-ins and click on APBS tools
3) click on APBS location and give locations for binary (installed in 
C:\program files\APBS) and psize.py (located in C:\program 
files\APBS\tools\manip)
4) click on set grid ---> output:
Maximum number of grid points exceeded.  Old grid dimensions were [129, 129, 
129]
Fine grid points rounded down from [107, 107, 107]
New grid dimensions are [97, 97, 97]
APBS Tools: coarse grid: (82.470,90.545,97.723)
APBS Tools: fine grid: (68.512,73.262,77.484)
APBS Tools: center: (29.733,20.940,40.031)
APBS Tools: fine grid points (97,97,97)

5) click on Run APBS --> output:
ObjectMapLoadDXFile-Error: Unable to open file!

6) click on Visualization tab and click update --> nothing happens.

Can someone please tell me what I am doing wrong?

Thank you so much for any assistance.

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