VPN Tunnel established still can’t RDP

I have a Sonicwall SOHO3 at our office and a Linksys WRV200 router at home. I have established the VPN tunnel (at least it shows as being active), but cannot ping any of the IP addresses from home to the office network. I have checked, re-checked and triple checked the settings but can’t find anything preventing the ‘completion’ of this tunnel. Anyone have any ideas? I’m not overly versed in VPN’s so be gentle! 🙂