Can't Save parameters Payment method and delivery in Virtuemart 2

[Seregin2013]

Hello!
I have faced with really rare problem. When I moved my website from local server to internet server, the parameters of payment method and delivery method in Virtuemart 2.0.20b  don't save changes.  For example in payment method where you need to type your email in the line -  PayPal payment email, after saving, the parameter switch to default " your-PayPal-Merchant-email@domain.com". The same situation when you try to define delivery costs by regions.
All other parameters I can save. I can create products, prices for products, new payment type, delivery type etc., but I have problems with only two categories 1. Payment method and 2. Delivery (when I try to type delivery costs).
When I tried to insert data such as PayPal email and delivery costs in MySQL manually, these parameters save the input, but there is no result in the frontend of the website (still require to define PayPal email address) and in Virtuemart configuration the data doesn't save (but in MySQL did).
Here is the information of my Joomla version and SQL:
1. Joomla version  2.5.11
2. Virtuemart version 2.0.20b
3. SQL version on local server 5.5.25
4. SQL version on internet server 5.0.77
Once again, on local server everything works perfectly, but on internet server the two parameters don't save changes in Payment method and Delivery method.
I hope on your help. Thank you in advance.

[Seregin2013]

Some info about my PHP version at localhost and internet server

Php version on internet server:               
PHP Version 5.2.14   Problem with data putting in Payment method and Delivery


Php version on localserver server:
PHP Version PHP Version 5.3.13  On this version I can add all data

[jenkinhill]

Are you logged in as Vendor on both sites? If so it looks like you need the host to upgrade the PHP version. The preferred PHP version for Joomla 2.5 is V3+ anyway.