OpenGL invisible terrain

[Orange9876]

I am using GL_TRIANGLE_STRIP to draw my terrain to the screen, however when I compile and run the program I get nothing. When I change GL_TRIANGLE_STRIP to GL_LINES it shows up and works. What can I do to get it working with GL_TRIANGLE_STRIP?

here is my draw code:

void drawScene() {
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	glTranslatef(0.0f, 0.0f, -10.0f);
	glRotatef(30.0f, 1.0f, 0.0f, 0.0f);
	glRotatef(-_angle, 0.0f, 1.0f, 0.0f);
	
	GLfloat ambientColor[] = {.5, .5, .5, 1.0f};
	glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientColor);
	float scale = 5.0f / max(63.0,63.0);
	glScalef(scale, scale*10, scale);
	glTranslatef(-(float)(63.0) / 2, 0.0f, -(float)(63.0) / 2);
	     /*GLfloat lightColor0[] = {0.6f, 0.6f, 0.6f, 1.0f};
	     GLfloat lightPos0[] = {-0.5f, 4, 32, 0.0f};
	     glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor0);
	     glLightfv(GL_LIGHT0, GL_POSITION, lightPos0);*/
	
	
	
	glColor3f(0.3f, 0.9f, 0.0f);
	for(int x = 0;x<64;x++){
		glBegin(GL_LINES);
		for(int z = 0;z<63;z++){
			glNormal3f(0,1,0);
			Vertex(x,map[x][z],z);
			Vertex(x,map[x][z+1],z+1);
		}
		glEnd();
	}
	for(int z = 0;z<64;z++){
		glBegin(GL_LINES);
		for(int x = 0;x<63;x++){
			Vertex(x,map[x][z],z);
			Vertex(x+1,map[x+1][z],z);
		}
		glEnd();
	}