Sometimes the pages from MaxLeases may display slowly on your computer or display with errors. This can be due to your local virus scanner. If the scanner is set to scan ALL web pages then it may slow down the pages from MaxLeases as it scans the contents of the web page before allowing it to be displayed.
In extreme cases the virus scanner may take so long to scan a page that it sends incomplete pages to the browser, making it difficult or impossible to use MaxLeases.
To ensure that your virus scaner is not causing performance issues, try setting the virus scanner to ignore any pages from maxleases by excluding pages from http://www.maxleases.com/* (or similar) from the scanning.