Hi, and (again) welcome to the MegaGlest forums, Renanlucaz!
Based on your Screenshot, I assume you are trying to run MegaGlest version 3.6.0.3 on Windows XP and it is failing to run. Is this correct?
First of all, we need more information. Please read the sticky topic on how to properly report bugs and add all the missing information, also providing the error message as plain text (so others can search for it, your screenshot is also small enough to make it hard to read the text) as well as a description of how you installed and run MegaGlest.
Your screen shows that you have megaglest.exe in C:\Documents and Settings\Desktop\MegaGlest\megaglest.exe which is a non-standard location (not saying this is wrong, but it may hint at a possibly broken custom installation). I can also tell by looking at the screenshot that you have three processes running which directly relate to MegaGlest (in addition to the Explorer window), namely the command prompt window, the error message on top of it, and a third one which is not visible. Is the third window minimized?
Based on the icons in your systray, you seem to be using two network connections at the same time, can you confirm this?
Edit: I've deciphered the exception code you have there which is: 0x6167654d 0x73656c47. Other people have reported this before (try the forum search) but we've received very little information about this so far. I will try to get them to provide more information, too, so we can possibly work out a fix or workaround.
Edit2: I've reviewed earlier related forum posts to (hopefully) get a better idea of what this exception means: This exception code is apparently generated by Windows, but it's specific to MegaGlest (all the Internet search results for this code refer to MegaGlest, both the official builds and peoples' own builds), but not to a specific megaglest release apparently (there are reports for versions spanning from 3.5.2 to post 3.6.0.3, i.e. development builds). It's not limited to a specific Windows version (there are reports on Windows XP SP2 and SP3, Vista and Windows 7) or architecture (both 32 and 64 bit Windows). For most but not all people reporting it, this exeception occurs right when they start MegaGlest. For others, however, it only crashes after some minutes, triggered by switching menu screens or some action in-game.
So this is still quite nebular, and I've truned to all the previous reporters of this issue, asking them to please help us get more information on this issue.