Sorry for delayed reply. As the feeds are using xml files and in our new server xml file version is 2 and the rss file which has been used has a version 0.92 so may be for incompatibility issue the rss feeds are not working. Please check and ask the script community what should be the rss file version for xml 2 files. According to my server that is the problem why my feed is not working in WordPress? I have no idea what to do about it.