Those beeps don't seem to match up to anything I can find. If they are, in fact, Phoenix brand bios' then they should match something on this link:
Even my ASUS mobo's have 3 or 4 series of beeps as warnings. The shortest being 3.
The only way to investigate further would be to get the motherboards part number, the Phoenix bios version number and try to match it up in a google search. Every RAM stick I have has a part number. That might help if the motherboard manufacturer has a list of approved memory.
On the right hand side of the link I gave you, there are links to bios beep codes from other brands of bios'. From what I can see, whenever a long beep is involved, it tends to point to a RAM problem, either regular RAM or GPU RAM. Without exact part and version numbers, it'll be hard trying to narrow it down.