Texture binding

Hi! I bound a texture with

glBindTexture(GL_TEXTURE_2D, textureName);

and enabled it with

glEnable(GL_TEXTURE_2D);

Afterwards I wanted to render another object without a texture and I disabled the texture with

glDisable(GL_TEXTURE_2D)

But the object appeared in the color of the first pixel of the texture I bound before. If I change the color of the first texture pixel, the object color changes too. But the texture was disabled, so how can that happen? I also tried to call glBindTexture with NULL, but this did not change anything. How can I disable the texture completely? Thanks in advance.