cant install updates

[White]

im running debian 5 and have been for quite a few months without issue.

I now have come accross this problem, if i select the gold star in the top bar to install updates it says,

cant install updates another synaptic is running please wait for it to finish

if i do apt-get update
apt-get upgrade i get the following error

E: Could not get lock /var/cache/apt/archives/lock - open (11 Resource temporarily unavailable)
E: unable to lock the download directory

any ideas???

[White]

strange but after my third reboot its working now.