Alejandro,
When you say you “see a lot of icon of myEclipse”, do you mean that you see the MyEclipse logo button (next to the Eclipse logo button) more than once? So something like:
<top of about dialog that shows the Eclipse Logo and copyright notices>
-------------------------
[MYECLIPSE][MYECLIPSE][MYECLIPSE][MYECLIPSE][ECLIPSE]
[Feature Details] [Plugin Details] [Configuration Details] [OK]
If this is the case, then check your log file for exceptions:
<eclipse install dir>\workspace\.metadata\.log