Help: Problem with Quartus and fx2 USBBlaster emulation

Hi,
I am trying to use fx2 software from FPGA4U to emulate Altera USBBlaster cable. After downloading the software to the FX2, most of the time Quartus does not recognize the cable, but once in a blue moon it does recognize and I can use the cable very normally for a day till I disconnect the cable from the PC. I am really perplexed, as even when Quartus does not recognize the cable, I seem to be able to issue all JTAG commands using urjtag tool with cable type set to USBBlaster.
Is it possible to program a Cyclone device from the Altera SOF file using urjtag?
I am attaching the output from using lsusb on the USB device after downloading fx2 emulation software.

My system:
PC running 64 bit Ubuntu 9.10
Quartus 9.1 or 10.0 beta (Linux version)
Board: Altium LiveDesign EB2 with Cyclone

Output from lsusb:

Bus 002 Device 043: ID 09fb:6001 Altera
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x09fb Altera
idProduct 0x6001
bcdDevice 4.00
iManufacturer 1 Altera
iProduct 2 USB-Blaster
iSerial 3 91d28408
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 55
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 2 USB-Blaster
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 2 USB-Blaster
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x06 EP 6 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x88 EP 8 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)

Thanks.