freebsd stable - Dec 2006 - RELENG_6 umass problems (was working some weeks ago)

Hello,

I have problems mounting/accessing my 2G mini-SD Card. With RELENG_6 from some 
weeks ago I had no problems (the card has fine sounds on it ;)
Now when I put in the card, make a 'camcontrol rescan 0' I cannot get
the
partition table with fdisk nor can I mount it.
I get:
g_vfs_done():da0[READ(offset=0, length=2048)]error = 16

My other 64MB Card is working fine, but like mentioned the 2GB card also 
worked some weeks ago, same card reader of course (USB)

Here's some info:
camcontrol devlist
<Generic USB SD Reader 1.00>       at scbus0 target 0 lun 0 (da0,pass0)
<Generic USB CF Reader 1.01>       at scbus0 target 0 lun 1 (da1,pass1)
<Generic USB SM Reader 1.02>       at scbus0 target 0 lun 2 (da2,pass2)
<Generic USB MS Reader 1.03>       at scbus0 target 0 lun 3 (da3,pass3)

usbdevs
addr 1: UHCI root hub, Intel
addr 1: UHCI root hub, Intel
addr 1: EHCI root hub, Intel
addr 1: UHCI root hub, Intel
addr 1: UHCI root hub, Intel
addr 1: UHCI root hub, Intel
 addr 2: Trackball, Logitech
 addr 3: Microsoft 3-Button Mouse with IntelliEye(TM), Microsoft
addr 1: EHCI root hub, Intel
 addr 2: Mass Storage Device, Generic

-v
Controller /dev/usb6:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000), 
Intel(0x0000), rev 1.00
 port 1 powered
 port 2 powered
 port 3 addr 2: high speed, power 100 mA, config 1, Mass Storage 
Device(0x6362), Generic(0x058f), rev 1.26
 port 4 powered
 port 5 powered
 port 6 powered

Any hints?

Thanks in advance,

-Harry