Problem during import the P5 file to P6

When i import the P5 file to P6, the problem happened and the detail information is as following:
*****************************************************
* EXCEPTION REPORT *
*****************************************************
Date: 02-Jan-08
Executable: PM.exe
Application: Primavera Project Management
Event Code: AVAA0-2610-9
Message:
Access violation at address 00E7B064 in module ’PM.exe’.
Read of address 00000000
Context:
1: TfrmWizImport.wizImportFinish
2: TfrmWizImport.wizImportFinish
3: TfrmWizImport.wizImportBeforeShowPage
4: TfrmWizImport.wizImportFinish
5: TfrmWizImport.wizImportBeforeShowPage
6: TfrmWizImport.RunImportWizard
7: TfrmMain.actHomeExecute
8:
9:
10:
Detail:
Type: EAccessViolation
Object Type: TCUltraButton
Components
==========
ORI: ORI Win32 #
ORI/DB: PMDB,0600.0011.0001.0002
IMG: IMG Win32 #1000
System Info
===========
Username: u388793 Hostname: WXP1951L3D2801
OS Version: Windows NT ver 5.1, build 2600, Service Pack 2 (Intel Pentium)

I am using P6 standalone revision, i have send this case to Primavera and still can not get solution. Anyone who has the answer please post.

Thanks,
Shen Hengxiang