I had the same problem and read several forums like these with people with the same problem. I fortunately was too cheap to buy any fix and did not wish to download a driver detective program. I have two compaq presario v2000 computers and my new sdhc card
worked on one but not the other. So...I compared the two driver files. The newer computer had a texas instrument flash reader that was a few months newer. I was not able to download an update for the driver without using the detective software program...which
i again was skeptical of doing. So I copied the newer version of the program to an older SD card and replaced my files with his files. It worked. Now both old and newer SDHC cards work perfectly. The file that i was missing was: tifm21.ifm
I copied all files named TIFM21.* and saved them in a folder I created and called SDHC fix. I inserted the SDHC card and then the ifm file was automatically removed/extracted from those files.
I am not a computer wizard of any kind and all the other fixes out there were just too complicated. Good luck with this but the problem was with the flash media driver and not the sd driver.
HP Compaq Texas Instruments Media Card Driver Details:
<label class="driverDetailLabel" style="font-weight: bold; font-size: 12px; float: left; vertical-align: top; width: 130px; line-height: 14px; height: 2em;">Operating Systems:</label>2000,
XP
<label class="driverDetailLabel" style="font-weight: bold; font-size: 12px; float: left; vertical-align: top; width: 130px; line-height: 14px; height: 2em;">Version:</label>2.0.0.2
<label class="driverDetailLabel" style="font-weight: bold; font-size: 12px; float: left; vertical-align: top; width: 130px; line-height: 14px; height: 2em;">Driver Date:</label>9/20/2005
<label class="driverDetailLabel" style="font-weight: bold; font-size: 12px; float: left; vertical-align: top; width: 130px; line-height: 14px; height: 2em;">File Hash:</label>9788B5BA619E3DC28C7D81665B12CA46