Guild Wars 2

Hello,

Does anyone have an idea why my Guild Wars 2 client crashes every 1min to 15min.? Any help is much appreciated!

Full crash log is attached.

Thanks,
Monque

Computer Specs
Microsoft Windows 8 Pro 64bit
Intel Core i7 3770S @ 3.10 GHz
16GB DDR3 RAM
GeForce GTX 660 Ti

Crash Results

 
*--> Crash <--*
Assertion: (m_dims.x == highResDims.x >> 1) && (m_dims.y == highResDims.y >> 1) 
File: ..\..\..\Engine\Gr\Dx9\Dx9Tex.cpp(1154)
App: Gw2.exe 
Pid: 4312
Cmdline: 
BaseAddr: 00400000
ProgramId: 101
Build: 18958
When: 2013-05-31T08:57:31Z 2013-05-31T10:57:31+02:00
Uptime:   0 days  0:13:56
Flags: 0