"postback" event not related to REVIOUS and NEXT button on Internet Explorer?

in my case PageA has a buttonA that opens PageB. The code is "response.redirect("PageB.aspx");"

on PageB I have some methodM to call under condition "if (!IsPostBack)"

After I clicked on ButtoA to open PageB, methodM is trigerred.

but when I use the PREVIOUS button on Internet Explore to go back to PageA and click on NEXT button to go back to PageB the methodM didn't fire.

How can I catch the Previous and Next button click event?

the answer is adding the code below into Page_Load in the target page, this line of code will force the target page to load from server instead of cache

Response.Cache.SetCacheability(HttpCacheability.NoCache);