SDHC card not working

Is it a 32 or a 34 Gig card? Does it say SDHC or SDXC?
because the SDHC should work, but the SDXC can't work in your camera.SDHC cards go to max 32 Giga byte. Above 32 G, it is SDXC.
Please don't forget to format the card in your camera the first time you put it in the camera.
Don't trust a format done in the computer. Or even formatted in an other camera from the same brand or same model, can cause trouble.

Get an SD card. Your 8GB card is actually an SDHC card. While it fits into the slot it is electronically incompatible and will not work with your camera. You need to use an SD card, 2GB and smaller.

SD cards go up to 2GB in size. SDHC cards go from 4GB to 32GB.

The PV-GS35 works with SD cards, not with SDHC cards. Your 1GB and 2GB cards are SD cards. Your new 16GB card is an SDHC card. While SDHC cards fit into the slot, they are electronically incompatible and will not work in devices not designed for them.

You haven't told us what kind of camera it is, but I can guess at the problem. There are two possibilities.

1. Your camera will only read SD cards, not SDHC cards. You've just bought a new memory card, not noticing that it was SDHC. The new cards don't work in your camera, not because they or the camera are broken, but because they're not compatible.

Cards up to 2Gb are generally SD. Cards over 8Gb have to be SDHC. 4Gb cards can be either SD or SDHC, but are almost always SDHC because they're cheaper. (I would avoid the rare, expensive, and problematic 4Gb SD cards.)

Your solution is to go find a 2Gb card, and be extra sure that it doesn't say "SDHC" on it. (If it does, it probably means that they made a 4Gb card, but there were some error locations and so they disabled half of it and packaged it as a cheap-brand 2Gb.)

2. You formatted the card NTFS, whereas the camera needs FAT32. You can format the card using Windows, but there is a complication: Windows defaults to "NTFS" when formatting, but memory cards normally use FAT32. Before you attempted this, you should have connect the card, and checked the 'properties' on the drive that appears. It probably said "FAT32". In this case, you could have gone ahead and formatted the card, but be sure that you chose "FAT32" from the drop-down list. If you format it NTFS, your camera won't be able to read it!

In this case your solution would be to format the card again, but using the FAT32 format.

You might find it useful to check your camera on dpreview (dot) com, and see if the memory card type is shown as just SD or SD/SDHC.

Many people are unaware that the newer SDHC format cannot be used with most older cameras. Your camera was manufactured well before the SDHC format came out. I'm sorry, but there's no way that a 4GB SDHC card will work with your camera, it just doesn't understand the new format of the card. The max size card that you can use with your camera is a standard 2GB SD card. More info may be found at this link.

Bet it's a brand new SDHC card.
There are several possible causes for "memory card locked", "memory card error", or "no memory card". Some include trying to use of a 4GB SDHC card with an older camera made before SDHC format came out. Others include problems with the tiny slide switch on the side of the card, or the electrical contact switch internal to the camera. The problem may also arise from simple formatting problems if the card has never been formatted in the camera (note that this will also erase the card). Troubleshooting tips for this problem may be found at this link.

The card may be incompatible.

Memory cards have grown enormously in capacity in the last couple of years, and even relatively new cameras may not be able to cope with the memory size of the newest cards.

SD and SDHC cards fit the same slots, but many cameras won't work with the SDHC (high capacity) cards. SDHC is not backwards compatible.

Maybe it is having trouble with the size of the memory. Memory cards have grown enormously in capacity in the last couple of years, and even relatively new cameras may not be able to cope with the memory size of the newest cards.

SD and SDHC cards fit the same slots, but many cameras won't work with the SDHC (high capacity) cards. SDHC is not backwards compatible.

Your camera was not built to take the new SDHC cards. You can only use SD cards up to 2GB.

The 32GB SDHC card may be a "class 4" card, not a "Class 6".

Look at the card and find the circle with a number in it.
Class 6 is the highest speed available. Class 4 is much slower and can't keep up with video.

Not all 32GB sdhc cards work with all camcorders.

Try formatting the card twice in the JVC.