Hi megami56,
IIS 5.0, 6.0 and IIS 7.0 Classic mode
<configuration>
<system.web>
<httpModules>
<add name="CuteEditor.UploadModule" type="CuteEditor.UploadModule,CuteEditor"/>
</httpModules>
</system.web>
</configuration>
IIS 7.0 Integrated mode
<configuration>
<system.webServer>
<modules>
<add name="CuteEditor.UploadModule" type="CuteEditor.UploadModule,CuteEditor"/>
</modules>
</system.webServer>
</configuration>
Try give full permission to user "Everyone" of the temp directory and try again.
Regards,
Ken