QUOTE(gump271 @ Feb 25 2008, 07:59 PM)

You have to make sure the serial numbers all match up to get it to see the Gps from the computer.
I have the explorist 600 and I was having a similar problem with the files containing the MI trail maps that someone from Hardcore provided a link to. I first put them on my SD card using my stand alone SD reader and the unit wasn't seeing them. I tried downloading the files from the software to the unit and it kept telling me that there wasn't enough room. What I finally figured out was that the unit was only using the internal 16mb of memory and not looking at my 512mb SD card. While connected to the USB, I changed the setting on the unit itself to let it copy to the external memory and not the internal memory. Problem fixed. I haven't figured out how to change the memory location in the menus, but changing the file transfer setting on the GPS unit solved the problem.
Hope it works. If you're not sure about the file settings I'm talking about, post back and I will walk through it on my unit and post exactly what I did and where I did it.
Bill
Thanks for the offer of help. I did succeed at loading the TOPO 3D maps from Mapsend.
This was after three different calls to Magellan. The Mapsend Topo 3D gets about 75% of thr way through converting your selected region, then it pops an error message, wants to send a report to Microsoft, and then closes the application (mapsend).
Magellan had me go to "start" and run "msconfig", change my start-up options, and reboot. Then they would tell me to call back if this did not fix the issue. Three calls later, and I basiclly gave up.
I did get lucky enough to get the UP, northern LP and the corner of Wyoming where my freinds hunts. But no amount of trying, would allow me to load the southern put of the Michigan's LP.
Loaded the sled maps from gpssled using the Magellan Conversion Manager, not the mapsend software. Looking at the eXplorist, it does show the maps are there. So I do believe I was successful.
On a side note, Magellan tech support did not recommend using a card reader, they had me use the USB cable hooked to the eXplorist. Also I never did get the software to work on my laptop. Only on my desktop. Vvvvvvery frustrating experience.
But thanks for all the help.