This is a clinical research study of a new investigational treatment for cancer called "DTI-015" to be given by intratumoral injection. Intratumoral injection is when drug is injected directly into the tumor. This study will help doctors find out what is the best dose level for DTI-015 and if this treatment can shrink tumors without causing severe side effects. The effects of the drug on the patient's quality of life (how the patient feels and what the patient can do) and their mental functions (reasoning and thinking abilities) will also be studied.