Can't install Eclipse plugin

I'm trying to install an Eclipse plugin for Mylyn/Fogbugz, and I get the following error when I try either EclipseBugz or Foglyn:

Cannot find a solution satisfying the following requirements Match[requiredCapability: org.eclipse.equinox.p2.iu/org.eclipse.swt

I'm using Eclipse 3.4.1

From stackoverflow

• Are you using Eclipse Classic?

  skriv : No, I'm pretty sure I downloaded the RCP distro.

• Eclipse plungins require Equinox UI for dependency.Please read Equinox installer .I hope can help you. : )

  Peter Štibraný : Do you mean that ALL eclipse plugins require this dependency?

  Chatsiri.rat : No,I mean only iu package in Equinox.

• Hi,

  what other update sites do you have enabled in your Eclipse installation?

  I had similar problem when upgrading from older Mylyn, and found out that it helps to disable other updates sites. When installing new plugins, or even updating old ones, Eclipse has a tendency to contact all enabled update sites. I don't know what exactly it is trying to do, but it helped me to disable all sites except one I wanted to use.

  Btw, Eclipse 3.5M6 has option to use only selected update site -- it is great help when updating/installing plugins. I cannot wait to see Eclipse 3.5 final released, just for this feature.

  skriv : This worked for Foglyn, but not EclipseBugz. I just disabled all other sites but yours. Thanks Peter!