Sharepoint 2010 FBA Site Error when trying to get trusted forests and domains

I have a fba site configured to use LDAP instance all works fine users are able to authenticate and I was able to search users within peoplepicker. Recently for some reason when searching for users within peoplepicker it just keeps searching and after few minutes timesout. Nothing has changed and we just starting to get this behavior below is the error from log:

Error when trying to get trusted forests and domains. Exception message: Thread was being aborted., callstack:   
 at Microsoft.SharePoint.Win32.SPNetApi32.UnsafeNativeMethods.DsGetDcName(String ComputerName, String DomainName, IntPtr pDomainGuid, String SiteName, GET_DC_NAME_FLAGS flags, IntPtr& pDomainControllerInfo)    
 at Microsoft.SharePoint.Win32.SPNetApi32.DsGetDcName(String domainName, GET_DC_NAME_FLAGS flags, DomainControllerInfo& dcInfo)

Any help would be appreciated.

Thanks,

Venkataramana Bolla