Dear ThomaxVision,
You can refer to
http://ajaxuploader.com/Deployment.htm, did you follow this installation steps? You can find 2 settings, If you change to another setting, does it work?
IIS 6.0 and IIS 7.0 Classic mode
<configuration>
<system.web>
<httpModules>
<add name="CuteWebUI.UploadModule" type="CuteWebUI.UploadModule,CuteWebUI.AjaxUploader"/>
</httpModules>
</system.web>
</configuration>
IIS 7.0 Integrated mode
<configuration>
<system.webServer>
<modules>
<add name="CuteWebUI.UploadModule" type="CuteWebUI.UploadModule,CuteWebUI.AjaxUploader"/>
</modules>
</system.webServer>
</configuration>
Thank you for asking