Combining Multiple VPN Connections

Hi

I am on a Local Area Network. My LAN Administrator has given me a VPN Server IP(10.101.10.1), through which i can connect to the Internet, using a VPN Dialer. Bandwidth is restricted to 8 KB/s on each VPN Account. If i have 2 VPN accounts, i made 2 Dialers (which dial to 10.101.10.1). Each of the dialers is assigned the respective accounts.when i connect both the dialers, they connect me to the internet, but I am still restricted to 8 KB/s.
Now the Question is, Is there any way to combine the bandwidth of both VPN Connections, getting 16 KB?