ProQuest urls are too long to work as links in ERes, so we need a workaround. The best workaround I've found so far is to create a document on the fly and use html markup in the document to create link to the ProQuest reading.
Sample text for the on the fly document is as follows:
<P>Click <A HREF="Insert ProQuest URL here"> here</A> to connect to this reading.</P>
<P>If you have difficulty connecting to this reading from home, please refer to <A HREF="http://healthlinks.washington.edu/help/connecting.html">Connecting to UW Online Restricted Resources</A> for help.</P>