Work with textures

Hi,I’m new in glsl.
I want to use from ‘texture2d’ function twice for 2 separate texture and mix their colors.
But i don’t know how i can do this work.
I wrote this code for do it, but not work.
Vertex program:

void main()
{
	gl_TexCoord[0] = gl_MultiTexCoord0;
	gl_Position = ftransform();
}

Fragment Program:

uniform sampler2D tex0;
uniform sampler2D tex1;
void main (void)
{
	vec4 Color0=texture2D(tex0, gl_TexCoord[0].st);
	vec4 Color1=texture2D(tex1, gl_TexCoord[0].st);
	gl_FragColor = (Color0+Color1)/2.0;
}

Initial C++ Code:

.
.
.
glBindTexture(GL_TEXTURE_2D,0);
Load Tex0

glBindTexture(GL_TEXTURE_2D,1);
Load Tex1

int Tex0 = glGetUniformLocationARB(my_program,"tex0");
glUniform1iARB(Tex0,0);

int Tex1 = glGetUniformLocationARB(my_program,"tex1");
glUniform1iARB(Tex1,1);
.
.
.

Please help me.
Thank you for your attention.

What happens when you call glUniform1iARB(Tex0,0); and glUniform1iARB(Tex1,1); before binding the textures?

glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D,0);
Load Tex0

glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D,1);
Load Tex1

int Tex0 = glGetUniformLocationARB(my_program,“tex0”);
glUniform1iARB(Tex0,0);

int Tex1 = glGetUniformLocationARB(my_program,“tex1”);
glUniform1iARB(Tex1,1);

Thank you for your answering.
But it doesn’t work well yet…
And color0 and color1 values are same!

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