Transfer Function Block Component not working properly

When using a Transfer Function Block, and you enter in the polynomial coefficients for a simple RC Passive Low-Pass Circuit, and perform an AC analysis side-by-side to its circuit equivalent, it works great.  The 2 frequency response waveforms are identical.  However, when you add another RC Low-Pass section in cascade with the 1st one, making it a 2-pole RC Passive Low-Pass Circuit, and you put its polynomial coefficients into the transfer function block the results of the AC Frequency Response is not identical to its 2-pole circuit equivalent.  I double checked my math to make sure my transfer function math was correct.  Since 2 transfer functions are in cascade, the transfer function from the 1st RC stage is multiplied times the transfer function of the 2nd RC stage, and the result is the overall transfer function.  I even went as far as creating 2 transfer function blocks, each of them, with a single RC transfer function and connecting them in a cascade fashion.  The results were the same....the trasnfer function block(s) do not resemble their circuit equivalent models for a >=2pole Passive RC Low-Pass filter.

The transfer function of a RC ist not retroactively-free, this is the reason why the transfer function of 2 RC Circuits is not 1 / (1 + RC*s)^2 ! You can not multiply the one function of one RC with the other!
You have to solve the differential equation of the RC circuits, to get the real transfer function.

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    Hi 
    I am Bharath
    last week i have puchased lenovo g510 laptop and installed windows 8.1 and later on automatically function keys and all the keys were not working properly. if i press key to increase brightness and some other operation is performing by its own. What's wrong with this LENOVO brand is this the way you take lots of money from people. I need an immediate solution from basic support to my home. If at all it is not resolved i will file a case on consumer court that LENOVO was chaeten me and what ever it may be i will go for end.
    Give me a clear answer with out any stupidity
    Moderator Note; subject edited; post moved here to start new thread

    hi bharath666,
    Welcome to Lenovo Community Forums!
    Were you able to install all the drivers and Software After the New installation of Win 8.1?
       Get the drivers here
     http://mobilesupport.lenovo.com/us/en/products/laptops-and-netbooks/lenovo-g-series-laptops/lenovo-...
    Start with the Chipset installation first then whatever comes next.
    Make sure you select the proper version for your Windows type and version.
    Regards
    Solid Cruver
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