unable to load the webpage because the server sent no data

Hi Webmasters, Good day to all,

Hi have a website which is using wordpress3.3.2 ,it is every time showing like “unable to load the webpage because the server sent no data”.For each time i am downloading sane database and uploading to server by deleting old data,then it is working fine after doing like this.

Friends any one tell me how to resolve this issue.

thanks for every one.