Unable to VPN from a hotspot

Our VPN is  set up on Firebox 750e. I use PPTP, TCP 1723 and GRE 47 are forwarded. I can VPN from home using my XP PC, however, I can't VPN from the library using my XP laptop. My laptop and PC settings are the same.
Could the problem be the library router not allowing traffic pass-through?

Please help
ecfmisAsked:
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netbonesConnect With a Mentor Commented:
Yes, the library does not have PPTP passthru enabled. It is also likely that they only allow http or https traffic and nothing else.

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dpk_walCommented:
It really appears that the library network is not allowing VPN traffic out; if possible contact the library network administrator and double check if this is the issue and if they can allow the traffic through.

Thank you.
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