Multiple Joomla installations with same users - Joomla! Forum - community, help and support

hi ,
i running website on joomla 1.5.25..... started new joomla 2.5 site on same server in different directory...
i want connect these joomla site in such way users should register , login joomla 1.5 should registered in joomla 2.5....and if logged in 1.5 access both sites , components etc.

please me...

waiting detailed reply...
kashif

not possible. multi site extensions , joomla versions require separate installation hence need migration 1.5.x (which should update 1.5.26).