Remote access sql server 2005 over internet

Remote access sql server 2005 over internet

I find so many similar question/problem and go through but unable to solve
my problem. As so I am repeating the question again.
I would like to connect my sql server 2005 remotely over internet. I have
a ADSL router (I also have a static IP provided by ISP) SQL Server 2005
(Running on a local IP 192.168.1.150)
I can connect this server with the Host Name/Ip Address ->
192.168.150\SQLEXPRESS from the another computer in the same network.
Please kindly help me to configure my server to access remote through
internet as Host Name/IP Address -> mystaticIPbyISP\SQLEXPRESS
I am using a DSL Router Model DNA-A211-I And I made the NAT->Virtual
Server forwarded to 192.168.150
Still unable to access remotely from internet.
Kindly help me.