What semi-colons?

Ummm. The ones at the beginning of your lines, which are commenting out your code.

I have write:

WICastMagic04.Setstage(10)WICastMagic04.SetObjectiveDisplayed(10)

and I've got an error when I compile my script:

Starting 1 compile threads for 1 files...Compiling "TIF__00023EE1"...C:\Program Files (x86)\Bethesda Softworks\The Elder Scrolls V - Skyrim\Data\Scripts\Source\temp\TIF__00023EE1.psc(9,0): variable WICastMagic04 is undefinedC:\Program Files (x86)\Bethesda Softworks\The Elder Scrolls V - Skyrim\Data\Scripts\Source\temp\TIF__00023EE1.psc(9,14): none is not a known user-defined typeC:\Program Files (x86)\Bethesda Softworks\The Elder Scrolls V - Skyrim\Data\Scripts\Source\temp\TIF__00023EE1.psc(10,0): variable WICastMagic04 is undefinedC:\Program Files (x86)\Bethesda Softworks\The Elder Scrolls V - Skyrim\Data\Scripts\Source\temp\TIF__00023EE1.psc(10,14): none is not a known user-defined typeNo output generated for TIF__00023EE1, compilation failed.Batch compile of 1 files finished. 0 succeeded, 1 failed.Failed on TIF__00023EE1

I've done something wrong?

P.S.: Script source (TIF_00023EE1)

;BEGIN FRAGMENT CODE - Do not edit anything between this and the end comment;NEXT FRAGMENT INDEX 1Scriptname TIF__00023EE1 Extends TopicInfo Hidden;BEGIN FRAGMENT Fragment_0Function Fragment_0(ObjectReference akSpeakerRef)Actor akSpeaker = akSpeakerRef as Actor;BEGIN CODEWICastMagic04.setstage(10)WICastMagic04.SetObjectiveDisplayed(10);END CODEEndFunction;END FRAGMENT;END FRAGMENT CODE - Do not edit anything between this and the begin comment

you need to declare WICastMagic04 as a quest property and fill it by pointing it to your quest