smartermail installation failed

[EhiI]

Hello guys,
i tried to install smartermail in plesk using the add local application link, but i get this error

Ehi



Error Summary
HTTP Error 404.13 - Not Found
The request filtering module is configured to deny a request that exceeds the request content length. Detailed Error InformationModule RequestFilteringModule
Notification BeginRequest
Handler Plesk_Handler_04528988
Error Code 0x00000000
Requested URL https://localhost:8443/plesk.php/server/application-vault/upload/
Physical Path C:\SWsoft\Plesk\admin\htdocs\plesk.php\server\application-vault\upload\
Logon Method Not yet determined
Logon User Not yet determined
Most likely causes:
Request filtering is configured on the Web server to deny the request because the content length exceeds the configured value.
Things you can try:
Verify the configuration/system.webServer/security/requestFiltering/requestLimits@maxAllowedContentLength setting in the applicationhost.config or web.config file.
Links and More InformationThis is a security feature. Do not change this feature unless the scope of the change is fully understood. You can configure the IIS 7.0 server to reject requests whose content length is greater than a specified value. If the request's content length is greater than the configured length, this error is returned. If the content length requires an increase, modify the configuration/system.webServer/security/requestFiltering/requestLimits@maxAllowedContentLength setting.
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