Internet Access from Remote Location Using ASA5510

Hi Folks,I have the following setup:

Headoffice:
ASA5510(replaced ISA2004 yesterday)
Inside IP= 10.10.1.201
Outside IP= 210.7.19.X
DNS SERVER = 10.10.1.200
Mail Server= 10.10.1.203

Branch office-(Lease line connectivity)
NO DNS on site
Workgroup Server =10.10.3.x
Cisco router Fa0/0 = 10.10.3.100
Client PC's have Gateway as 10.10.3.100 (fa0/0 Cisco router)
client PC's had proxy setup on port 8080,ISA 2004 Server IP which now belongs to ASA 10.10.1.201
Client PC's can ping 10.10.1.201 (ASA 5510)

Problem:
Internet & Email works fine on all pc's+ server's with the new ASA5510 installed at Headoffice
Email works fine @ Branch office but no internet access.

Could someone pls give a hint what config needs to be checked so that clients AT REMOTE OFFICE can get internet access using the new ASA5510.

Thank you .