The performance of QtWebKit on Wince 6.0, including MIPS platform

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I am using Qt 4.6.0 version on MIPS platform, and it can't load any web pages, even a static html page.
I don't know why is this?
and when I start the webbrowser demo, the serial console will prompt out errors like below:

Exception 'Alignment Error' (4): Thread-Id=055a080a(pth=879029e0), Proc-Id=05510
 
0f2(pprc=862a99b0) 'browser.exe', VM-active=055100f2(pprc=862a99b0) 'browser.exe'
 
PC=41dc9094(qtwebkit4.dll+0x00389094) RA=41dc97bc(qtwebkit4.dll+0x003897bc) SP=0
 
01fb388, BVA=00000000
 
Exception 'Raised Exception' (-1): Thread-Id=055a080a(pth=879029e0), Proc-Id=004
 
00002(pprc=8240a30c) 'NK.EXE', VM-active=055100f2(pprc=862a99b0) 'browser.exe'
 
PC=c003fdd0(k.coredll.dll+0x0001fdd0) RA=80113b8c(kernel.dll+0x00005b8c) SP=de8c
 
f3f8, BVA=ffffffff
 
CTLPNL: cmdline=cplmain.cpl,6
 
--->>>CTLPNL: CPL='cplmain.cpl' icon=6 tab=0
 
QWaitCondition: Destroyed while threads are still waiting

Exception 'Alignment Error' (4): Thread-Id=055a080a(pth=879029e0), Proc-Id=05510

0f2(pprc=862a99b0) 'browser.exe', VM-active=055100f2(pprc=862a99b0) 'browser.exe'

PC=41dc9094(qtwebkit4.dll+0x00389094) RA=41dc97bc(qtwebkit4.dll+0x003897bc) SP=0

01fb388, BVA=00000000

Exception 'Raised Exception' (-1): Thread-Id=055a080a(pth=879029e0), Proc-Id=004

00002(pprc=8240a30c) 'NK.EXE', VM-active=055100f2(pprc=862a99b0) 'browser.exe'

PC=c003fdd0(k.coredll.dll+0x0001fdd0) RA=80113b8c(kernel.dll+0x00005b8c) SP=de8c

f3f8, BVA=ffffffff

CTLPNL: cmdline=cplmain.cpl,6

--->>>CTLPNL: CPL='cplmain.cpl' icon=6 tab=0

QWaitCondition: Destroyed while threads are still waiting

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can you help me?

Thanks