What do the ErrorCode 22737 and 24275 mean?

hi,

  we use follow code to connect CM,

try

{

Database db = new Database();
db.WorkgroupServerName = server;
db.Id = datasetId;
db.ConnectAs(request.UserInfo.Domain + "\\" + request.UserInfo.Username, request.UserInfo.Password);

}

catch(TrimException ex)

{

}

An error has occurred,the ex.ErrorCode is 22737 and  24275. 

So, What do the ErrorCode 22737 and 24275 mean?

Thanks