PCI Parallel port card, cannot get interrupt handler invoked

Question

UPDATE :[ Seemed to have been hardware error, working fine with same code but new card ]

I recently bought a very cheap parallel pci card (link) to try to learn a bit about device drivers in linux (via ldd3) on my ubuntu machine

I've connected leds to pins 2-9, and have been able to set/clear the pins using IO ports. However have not been able to raise an interrupt and handle it. Any help or pointers will be appreciated

(please note I have pin 9 directly wired to pin 10)

lspci

07:04.0 Parallel controller: Device 1c00:2170 (rev 0f) (prog-if 01 [BiDir])
Subsystem: Device 1c00:2170
Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at ccf0 [size=8]
Region 1: I/O ports at ccf8 [size=8]

after system boot, the io registers are:

DATA: 0xff,  STATUS: 0x07, CONTROL: 0xc0

I've tried:

outb_p(0x10, BASE+2);  // enable irq
outb_p(0x00, BASE);  outb_p(0xFF, BASE); // trigger interrupt
// => DATA: 0xff, STATUS: 0x7b, CONTROL: 0xd0

but the interrupt count(as reported by lspci) in /proc/stat 's intr line for IRQ11 (as reported by lspci ) remains zero

I have also tried wrapping the above seq between probe_irq_on/off() (with an additional outb_p(0x00, BASE+2); udelay(5) in between) which also fails to spot and report any interrupt. This kernel probing was done after a call to pci_enable_device(dev) in the module code.

Please let me know if any other info is required. Thanks in advance.