Since upgrading to Windows 7 (64bit) I have a problem in that the GPU only runs one work unit at a time.

copy of app_info

<app_info>
<app>
<name>milkyway</name>
</app>
<file_info>
<name>astronomy_0.20_ATI_x64.exe</name>
<executable/>
</file_info>
<file_info>
<name>brook64.dll</name>
<executable/>
</file_info>

<app_version>
<app_name>milkyway</app_name>
<version_num>19</version_num>
<flops>1.0e11</flops>
<avg_ncpus>0.5</avg_ncpus>
<max_ncpus>1</max_ncpus>
<coproc>
<type>ATI</type>
<count>1</count>
</coproc>
<cmdline>n2</cmdline>
<file_ref>
<file_name>astronomy_0.20_ATI_x64.exe</file_name>
<main_program/>
</file_ref>
<file_ref>
<file_name>brook64.dll</file_name>
</file_ref>
</app_version>

<app_version>
<app_name>milkyway</app_name>
<version_num>20</version_num>
<flops>1.0e11</flops>
<avg_ncpus>0.5</avg_ncpus>
<max_ncpus>1</max_ncpus>
<coproc>
<type>ATI</type>
<count>1</count>
</coproc>
<cmdline>n2</cmdline>
<file_ref>
<file_name>astronomy_0.20_ATI_x64.exe</file_name>
<main_program/>
</file_ref>
<file_ref>
<file_name>brook64.dll</file_name>
</file_ref>
</app_version>
</app_info>

system info.

Windows 7 (64 bit)
4 GB RAM
Phenom 9650 Quad core 2.30 GHz
ATI 4870
ATI graphics v8.12
BOINC v6.10.16

Anyone help?

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better have <count> set to 0.5