Ubuntu 12.04 Wifi Hotspot can't provide internet for 2 devices simultaneously

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http://askubuntu.com – The problem is in the title.. I'm using an old laptop to distribute the internet connection. The hotspot was created easily, and i can connect one device at a time, and use the internet provided by the old laptop. If i connect 2 devices, both of them loose internet connection, and the wifi keeps disconnecting. Is it a hardware problem? (weaker(?) wifi card, although i tested with 2 of them, or over all poor performance of the laptop (is a toshiba qosmio f20-132)). Or some kind of bad configuration? This is something to use sporadically, i don't intend to buy an access point, so any comment (HowTos)