increase disk space on VMWare virtual machine

I am trying to increase the virtual hard drive space on a VMWare VM, on an ESX 3.5 server.  When I go to increase it hot, I get  "a general system error occurred: internal error."  If I power the machine off and try to increase the disk space, it just doesn't take, no error message.  
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WinstinkAsked:
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coolsport00Commented:
Ok...remove them, then try the resize procedures...VMware's KBs suggest to remove snaps before resizing.
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coolsport00Commented:
You can't do it hot; after you pwr off th VM & make the change, you then need to finalize the change with a 3rd party tool (Gparted or Paragon) or diskpart if its not a system volume.

~coolsport00
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WinstinkAuthor Commented:
yes you can do it hot, and you can extend it through disk manager in 2008.  Should have mentioned i'm using 2008.  However, I cannot even get VMWare to add the disk space hot or cold.  
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coolsport00Commented:
Ah yes..2k8, 2k7, & Vista :)

Is your disk showing as IDE or LSI Logic in the VMs Edit Settings area?
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WinstinkAuthor Commented:
LSI Logic.
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coolsport00Commented:
So, is the option to change the virtual disk size greyed out on the VM when you power it down?
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WinstinkAuthor Commented:
no it is not greyed out, it lets me change the size, but when I click OK, it says it completed it, but the disk size remains the same.
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coolsport00Commented:
Ah...ok; that's because you're not done :)  What you need to then do when you power back on is go into Disk Mgmt and 'expand' the size. That should then increase it.

~coolsport00
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WinstinkAuthor Commented:
are you talking about disk management in windows?  If so I did that, it doesn't see the new space.  
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coolsport00Commented:
Yes, that's what I meant. Hmm...ok. Well, do you have snapshots?
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WinstinkAuthor Commented:
i do have snapshots.
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WinstinkAuthor Commented:
Thank you!  :-)
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coolsport00Commented:
You're welcome; sorry I didn't suggest that earlier...one of the 1st things I normally ask. Slipped my mind. Old age is getting the best of me it seems... :)

~coolsport00
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