It is important to clearing the cookies and cache to clean out your browser's memory.  Sometimes this can help solve immediate problems, but it is something you should do on a regular basis as normal maintenance.

Internet Explorer 6.x for Windows:

1. From the Tools menu, select "Internet Options."
2. In the Temporary Internet Files panel, click the "Delete Files" button.
3. Click the "Delete Cookies" button and click "OK" when prompted.
4. Click the ""Delete Files"" button and select "Delete all offline content".
5. Click "OK" when prompted.
6. Relaunch your browser.

Internet Explorer 7.0 for Windows:

1. From the Tools menu, select "Internet Options."
2. Click "Delete" under "Browsing History"
3. Click the "Delete All" at the bottom, then click "OK."
4. Click "OK." at the bottom of the Internet Options window
5. Relaunch your browser.

If you use Mozilla Firefox 2 or 3:

1. Click on the Tools menu, and select "Clear Private Data."
2. The "Clear Private Data" window will open, allowing your to select which private data you want to clear.
3. Be sure that both "Cache" and "Cookies" are selected.
4. Click on "Clear Private Data Now".