Nevermind what i've said above, the problem was the motherboard PCI timing setings...solved changing "PCI Delay transaction" to "enabled" in CMOS setup utility.
By the way i have got the -= OFICIAL NETODRAGON =- driver (based on SmartLink but version 2.9.10) directly from the manufacturer of my motherboard so thanks Jetway!!
As far as I know, it is not in the web yet so I would like to share it, but I don't have any web or FTP space to upload it. Any suggestions are welcome...
Here is the output of the ATI commands:

ATI: NetoDragon Soft Modem
ATI1: NetoDragon Soft Modem, 2.9.10 NetoDragon
ATI2: NetoDragon Soft Modem, 2.9.10 NetoDragon
ATI3: /dev/slamr0 modemap driver
ATI4: s00=000 s01=000 s02=043 s03=013 s04=010 s05=008 s06=002 s07=060 s08=002 s09=006 s10=007 s11=100 s12=050 s13=000 s14=001 s15=001 s16=001 s17=000 s18=000 s19=000 s20=000 s21=000 s22=000 s23=000
ATI5: Stored Profile 0:
ATI6: Stored Profile 1:
ATI7: Country: ARGENTINA

And this is the motherboard model:
625EMPxxx/625EMWxxx
(serial motherboard)
with embedded EBGA VIA C3 processor