Hmmm yeah sorryAlways state which version you are using. MM is producing new versions all the time, maybe you triggered a bug which is already fixed in a newer version.
I am using the latest version of modular power suits for mine raft 1.5.1 (0.4.0-444)
Along with the addons given on machinemuses site
Hope this helps
Also (on a different matter) the modular power suit addon (by Andrew2448) doesn't show up all of the addons in the tinker table
Is this due to a glitch on my side or is it a widely felt problem
Again this is for minecraft 1.5.1 versions