Updation of virtuemart AIO failed, giving error

[rajtrivedi2001@gmail.com]

Hi
On joomla 2.5.8, i have tried to update virtuemart 2.0

i have successfully updated to com_virtuemart.2.6.18
but it is still showing

Installed version 2.0.22a
Latest version 2.6.6
Latest release date 2014-05-29

when we go to components->virtuemart-aio it gives follwoing error

Fatal error: Class 'vRequest' not found in /j25/administrator/components/com_virtuemart_allinone/admin.virtuemart_allinone.php on line 34
It is giving error white installing com_virtuemart.2.6.18_ext_aio
in plugin paybox.

PHP Built On    Linux ip-203-124-105-77.ip.secureserver.net 2.6.18-028stab107.1 #1 SMP Wed Apr 17 19:10:55 MSD 2013 x86_64
Database Version    5.5.42-cll
Database Collation    utf8_general_ci
PHP Version    5.3.29
Web Server    Apache
WebServer to PHP Interface    cgi-fcgi
Joomla! Version    Joomla! 2.5.28 Stable [ Ember ] 10-December-2014 15:00 GMT
Joomla! Platform Version    Joomla Platform 11.4.0 Stable [ Brian Kernighan ] 03-Jan-2012 00:00 GMT
User Agent    Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0

please help

[denysok]

I have this one with virtuemart 3:
Fatal error: Call to undefined method vRequest::vmSpecialChars() in /.../www/administrator/modules/mod_vmmenu/helper.php on line 57
I don't know how to fix it