not able to send order confirmation Email

[namangarg88]

I am posting after reading other forums and blog posts. But couldn't found out the solution.
after confirming the order, not able to send/receive order confirmation mail.
while updating the order status, no notification is send to the user. Error: could not instantiate mail function.
now while creating a new user in Joomla, I receive user registration mail.
I have upgraded Virtuemart and Virtuemart AIO to the latest version.
Please help me in finding the solution.

[namangarg88]

I don't know how to remove this error. But I was sure that it has something to do with my database. So I deleted the old virtuemart database, installed a new database, then imported product, category and order related tables from my old database.
Now the site seems to be working fine.
But still stucked with SEF problem. Can anyone help in creating sef urls for my site.

Thanks

[jenkinhill]

Ask your SEF question in http://forum.virtuemart.net/index.php?board=116.0  with more info about how you are currently generating SEF