Access token error: timestamp_refused in linked oauth2.0

I have done linkedin oauth api in my local. API response from linkedin is working fine in localhost. When I've moved to server, i got error in linkedin api on the server like as follows.

oauth_problem=timestamp_refused&oauth_acceptable_timestamps=1349951029%2B-300

Solved:

FIRST SEE WHAT IS THE TIME DIFFERENCE BETWEEN THE WEB SERVER AND THE LINKED IN SERVER


In OAuth.php file there is a function [generate_timestamp] which is returning a time(). By changing it to

#to avoid the error of
#oauth_problem=timestamp_refused&oauth_acceptable_timestamps=#return time()+(difference of mints*sec);return time()+(40*60);