source fabric 1.8.1 ubuntu 10.04 install fail

Hello Everyone.
First I must say thanks to the developers.
Great program...I hope.

I've been trying to install Airtime and I've reached the point where I have to download from source fabric. My input command and error follow:

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sudo apt-get install airtime airtime-audio-samples --fix-missing
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
airtime airtime-audio-samples
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 11.0MB/176MB of archives.
After this operation, 235MB of additional disk space will be used.
Err http://apt.sourcefabric.org/ lucid/main airtime 1.8.1-1
403 Forbidden
Failed to fetch http://apt.sourcefabric.org/pool/main/a/airtime/airtime_1.8. 1-1_all.deb 403 Forbidden
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Is there a problem with the server or the files. Can anyone help?
Thanks in advance.