only 4 serial ports with kernel 2.6.14

After upgrading from 2.6.11.7 to 2.6.14.3 I seem to be limited to 4 serial ports (or have a problem with a 2-port board). dmesg before:

Serial: 8250-16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled ttyS0 at I-O 0x3f8 (irq = 4) is a 16550A ttyS1 at I-O 0x2f8 (irq = 3) is a 16550A ttyS4 at I-O 0x9400 (irq = 21) is a 16550A ttyS5 at I-O 0xa000 (irq = 22) is a 16550A ttyS6 at I-O 0xa400 (irq = 22) is a 16550A

and after:

Serial: 8250-16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled ttyS0 at I-O 0x3f8 (irq = 4) is a 16550A ttyS1 at I-O 0x2f8 (irq = 3) is a 16550A PCI: Found IRQ 9 for device 0000:02:01.0 PCI: Sharing IRQ 9 with 0000:02:05.0 ttyS2 at I-O 0x9400 (irq = 9) is a 16550A PCI: Found IRQ 5 for device 0000:02:02.0 ttyS3 at I-O 0xa000 (irq = 5) is a 16550A Couldn't register serial port 0000:02:02.0: -28

The last two ports (0xa000 and 0xa400) are on an SIIG 2-port board. Output from "lspci -vv":

0000:02:02.0 Serial controller: Siig Inc CyberSerial (2-port) 16550 (prog-if 02 16550) Subsystem: Siig Inc PCI Serial Card Control: I-O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Interrupt: pin A routed to IRQ 5 Region 0: I-O ports at a000 size=8 Region 1: I-O ports at a400 size=8 Capabilities: a0 Power Management version 1 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-

Suggestions? Thanks,

-- Bill Brelsford