Is the MSI NX6600LE TD256E incompatible with MSI K8N Neo3 mainboard ?

Question

Hello people,
I have a very ugly problem here. I have an MSI K8N Neo3 mainboard here, that with PCI Express and AGP slots.
It was working fine for a while, so I dont think the mainboard itself is bad.
Originally, an Inno3D Geforce 6200 with Turbo Cache, was installed on that computer. However, in the past week the owner buyed a copy of Battlefield 2 to have some fun, he also buyed an MSI NX6600LE TD256E PCI Express graphic card to replace the Inno3D Geforce 6200 with Turbo Cache.
I got that PC here today, in order to install the new MSI Graphic card, and also install the game. Now comes the ugly part: I cannot get that card to work in that computer, and I don't know why.
At first I thought that the card was defective, so I took it out of that PC and installed it on my own PC, and the card works in my PC (see signature), and my PC's graphics card works fine on the other PC (the K8N Neo3). Even the old Inno3D card works fine.
Since the card works fine in my PC (I've used it while writing this post), and my PC's graphic card works fine in the other PC, as well as the old Inno3D card, the only thing left for me to think is that the NX6600LE TD256E card is not compatible with the K8N Neo3 board, but that seems too strange for me.  
Can any one here tell me if there's some kind of compatibility problems between the MSI K8N Neo3 mainboard and the MSI NX6600LE TD256 Graphic card ?
Any help is welcome,

Answer 1

Update:
The card is compatible with the board. What was incompatible with the card, was a little chip in the board (fried) which I didn't noticed during the first inspection of the board.
Curious thing is that it accepted other cards and not the NX6600LE, but in the end, not even my own NX6600 card, or any other PCIe card worked at all. I guess the little chip suffered some kind of damage due to power problems in the place where the computer was. With this in mind, an electrical technician will be sent to the place to verify the electrical installations for problems of any kind, so we can correct them and prevent future problems.
Back to the board thing,  a new K8N Neo4-F board has taken the place of the semi-toasted K8N Neo3 board. Also, and thanks to the hibrid design of the K8N Neo3, we will still be able to use it. The PCIe slot is dead for sure, but the AGR Slot still works well, so we'll use it for traditional desktop aplications, such as word processors, internet surfing, e-mail, document scanning and printing, etc, etc, etc...
Well, that's all. I just wanted you guys to know; so no one keeps looking for an an answer to this (now solved) mystery. For me this case is now closed, so if no one is interested into it, Admins... feel free to delete the entire thread 
Be well you all,
Edwin