ok, everyone who cant get SA-MP working, now READ this.
1st: You gotta put SA-MP files to San Andreas installation directory. Not to sub-directories. (SAMP files do not replace/edit anything)
2nd: When you start SA-MP, select TOOLS > SETTINGS.
3rd: There's a text "San Andreas Installation Location" Below it should be your GTA:SA installation directory. If it ain't, then u gotta browse for it. Usually it's in c:\program files\rockstar games\gta: san andreas
4th: (i believe how u can get servers on the screen ) click Connect and it SHOULD NOT open normal GTA:SA.
hope this helps, fellas
and i do really hope u all will get ur SAMP's working