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Thank you so much for your advice. Can you please post me the steps to change the DB permission? I am using 1&1;servers. I called them up and they replied that this problem is due to I have exceeded limit of my usage and I am using shared database. I need dedicated server for the same. Can you please give me some advice on it.
Hmm, so that sound like 1&1;have limited your account then. Magento shouldn’t really be run on shared hosting, it’s just far too resource intensive. You either need to look at a dedicated server or at teh very least a VPS. I use Webfusion which is fine for my needs if that’s any help. http://www.webfusion.co.uk/virtual-private-servers/