Combining wavplay and filepath not working ?

Can't we dynamically choose the file we wanted to play? i tried this :

    [FileName,PathName] = uigetfile('*.wav','Select Audio File ');
    wavplay(FileName,45040);

and i've tried :

    [FileName,PathName] = uigetfile('*.wav','Select Audio File ');
    FILE=fullfile(PathName, FileName);
    wavplay(FILE,45040);

I got this following error: Input arguments must be real uint8, int16, single, or double-precision.

[I Made]

Then I tried :

    [FileName,PathName] = uigetfile('*.wav','Select Audio File ');
    FILE=fullfile(PathName, FileName);
    A=load(FILE);
    wavplay(A,fs);

got this following error : Unknown text on line number 1 of ASCII file E:\Blabla\test\host2.wav "RIFF0ˆ".

[Walter Roberson]

Is anything else able to play the file? 'RIFF' is very common in WAV files but it needs to be followed by binary 0 not by '0'

[I Made]

I think the header of all .wav file is RIFF, what do you mean by anything else able to play the file?