I'm not really an Imm, but I believe I can help you in this.
Let's start with a bit of the help "conduct":
help conduct wrote:
Think...what would you do if the head deity of your religion in real life
suddenly manifested before you? Would you yawn? Would you say, "Heya, God, how are things?" Would you take no notice? In reality, after you finished wetting your leggings, you would most likely be paralyzed by a combination of fear, awe, and joy. Roleplay this. Bowing to an immortal is not enough, especially if you have never been in his or her presence before. Kneeling is good, and prostrating yourself before the immortal is also acceptable. Note that this is not just before the immortal that you follow or wish to follow, but also before ANY immortal, whether you respect their sphere of influence or not. It is also common practice to ask permission before looking directly at any immortal.
I believe this pretty much says it all. Even if it's not the god that you've pledged your soul to, it's a being whose power is so immense that your mortal shell can't even begin to grasp it. Kneeling comes as a natural first reaction to the presence of such a being.
Now, as far as interaction goes, you should treat the Gods with respect. Even a Paladin of Dulrik, if confronted by Thuban himself, will use proper etiquette. He will address the God with a formal tone, yet remain steadfast in his beliefs and ideals. He will never, in any way, treat the God as a mere darkie (e.g. ignoring him). That pretty much goes for every class and every person. Except maybe the crazy ones.
I hope I managed to help a bit.
Krauss.