That company was acquired by India-based MOSchip Semiconductor Tech. in 2001.
A large chunk of IP was sold to Taiwan-based ASIX in 2011.  http://www.asix.com.tw/news.php?op=Asix … ;NewsID=76

It would appear that ASIX has a goodly amount of driver updates for various NetMOS/MOSchip devices.
  Unfortunately yours doesn't appear to be explicitly amongst them.
They don't seem to list even so much as a datasheet for an MCS9834(CV).

If this driver does work, please Request that it be added to DriverPacks Chipset (if i remember correctly).

If this driver fails to work, relay a close-up picture of the controller chip, or just type what it is that is actually written on the chip.  Knowing the name/logo upon it would be helpful, too.  At least this info should allow us to pinpoint the controller chip's specifications, date of manufacture, and hopefully drivers.  If you upload a copy of the drivers you did receive (check the legality of this FIRST in your legal jurisdiction), or point to an existing link online; this could be of assistance too.

At the end of this, if neither the reseller, nor the OEM, nor the chip manufacturer can supply working drivers, i would return it too, as mr_smartepants suggests.  Linux support may be lacking, too! 

So the drivers that came with the card didn't work?  I'd return it for a refund then.

Yes, the drivers didn't work- - -

How can i solve this problem??

So the drivers that came with the card didn't work?  I'd return it for a refund then.

Yesterday i bought a serial card NILOX but, in the devices i see an "Controller PCI Simple Communications" problem. . . .

These are the id hardware:

PCI\VEN_9710&DEV_9834&SUBSYS_00121000&REV_01
PCI\VEN_9710&DEV_9834&SUBSYS_00121000
PCI\VEN_9710&DEV_9834&CC_078000
PCI\VEN_9710&DEV_9834&CC_0780

How can i solve this problem??

Regards