uniform float doesn't work

[prunkdump]

hi !

I need to pass two parameters to my fragment shader, but I never get the right variable's values. So I tried to change the uniform to const variables like this :

/*******************/
/* FRAGMENT SHADER */
/*******************/
 
uniform sampler2D fishTex;
//uniform float aspectRatio;
//uniform float fishRadius;
 
const float aspectRatio = 1.5;
const float fishRadius = 0.5204475309;
...

and the shader works perfectly. Now if i try to do the same things with uniform :

/*******************/
/* FRAGMENT SHADER */
/*******************/
 
uniform sampler2D fishTex;
uniform float aspectRatio;
uniform float fishRadius;
 
...

And send the three values like this :

  glUseProgram(texProgram);
 
  GLint texVar = glGetUniformLocation(texProgram, "fishTex");
  printf("fishTex : %d\n", texVar);
  glUniform1i(texVar, 0);
 
 
  texVar = glGetUniformLocation(texProgram, "aspectRatio");
  printf("aspectRatio : %d\n", texVar);
  glUniform1f(texVar, 1.5);
 
 
  texVar = glGetUniformLocation(texProgram, "fishRadius");
  printf("fishRadius : %d\n", texVar);
  glUniform1f(texVar, 0.5204475309f);

I get positive variable's identifier (with the printf) but the values inside the shader doesn't change. Maybe they stay to 0. I don't understand where is the problem. I have wrote another shader with three uniform sampler2D and it works ...