do you have all relevant projects activated? to me it seems that you are testing out some of the sample applications that come with the JDE. if this is the case be warned that you also need to have the resource projects active if the project (myProject) your trying to run extends myProjectResource. This means that the project supports localisation and therefore requires a number of rrh and rrc files.
Other possible causes for your problem could be as follows.
1) do you have java 1.5 installed? JDE3.7 will work with Java1.4 but from V4.x 1.5 is a requirement.
2) the correct directory structure. all projects have package declarations and if these dont match the directory structure then you will get an error.
my advise to you, would be to active all projects and try to run. if this fails then i would locate the Manual for JDE3.2 (first manual) you will get it on www.blackberry.com/developer
and follow the steps in this to create the helloworld project (first without localisation). Then follow the steps to adding localisation if you want.