GUI vectors dimensions problem

I have created a gui file. That will take the signal's length,frequency,magnitude and phase and evaluate a sine signal according to this info and plot it. Everything works perfectly except phase term. When i try to consider phase shift in my calculation, i got "vector dimensions must agree" error. I am not able to add shift on my signal. The code i used fot this is below. What am i doing wrong ? Please help me it's urgent. Thank you.

%Get inputs from GUI

fs=str2double(get(handles.Fs,'String'));

a=str2double(get(handles.A,'String'));

p=str2double(get(handles.phase,'String'));

t = eval(get(handles.time,'String'));

phi=degtorad(p);

%Calculation

y=a*sin(2*pi*t+phi); <---- Problem is here.

% Create time plot in proper axes

plot(handles.time_waveform,t,y);

[Geoff Hayes]

Mustafa - please past the complete error message. Also, put a breakpoint in the code at the line

 y=a*sin(2*pi*t+phi);

and run your GUI. When the debugger pauses at this line, type the following lines in the Command Window, and record the results

 size(a)
 size(t)
 size(phi)