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[1] If my computer has a problem, I must not be able to enter to Facebook and Youtube either.

These days, there seems to be something wrong in the internet line I'm using. I couldn't enter other web-sites except for Facebook, Youtube, and here. He said that my computer has a problem. But I don't think so.
I want to say like [1].

"Must not be able to ~". Is it a correct expression?

Thank you in advance for your teaching.
Comments  
Son JamesI must not be able to enter to Facebook and Youtube either.
Completely understandable as is, but I think we'd more likely say I shouldn't be able to enter ... either, with the "expectation" meaning of "should".

CJ
In this context, use "should"

If my computer has a problem, I should not be able to access enter to either Facebook or Youtube either.
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AlpheccaStarsIn this context, use "should" If my computer has a problem, I should not be able to access either Facebook or Youtube.
I think he means Not these, so not those either rather than Not these, so not either of those.

CJ
CalifJimI think he means Not these, so not those either rather than Not these, so not either of those.
I was attempting to make a reasonable stand-alone sentence. But yours would be best in the context of other sites, some of which were not accessible.
Thank you so much for your teaching, Mr. Calif Jim Emotion: embarrassed
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Thank you so much for your teaching, Ms Alphecca StarsEmotion: embarrassed